Route playback lacks finesse

[davecraig]

Route playback has never had very much focus and so has some rough edges that need to be fixed. Here are the ones I noticed:

• Speech when setting next marker doesn't mention having reached the previous marker
• Immediately after moving to the next marker, the last marker is called out. That's because whilst it was the destination the callout was inhibited, but as soon as the destination is the next marker it can be announced.
• If playing a route, should we even call out other Markers, or should we just stick to the ones in the route?
• On route completion the beacon stops but there's no speech to say why

Without these changes the route playback feels a bit noisy.

[davecraig]

Another group of comments came in from a user just now:

• When I mark a marker or a waypoint with annotation the app does not read out the annotation.
• It would be good the be able to choose a setting, so the app is not telling me for a long time about a marker that I am walking a way from. Would just want to hear about the once in front of me. This is a very common request and should be relatively straightforward to implement.
• I would like to be able to choose a distance to when the app tells me about a marker in front of me, in my opinion 100 m is to far away, would like to have options like 20 m and maybe more distances.
• On my way to a destination with a beacon, the beacon stopped when I still was rather far away from destination. I agree with this, and it's related to Make "Distance to Audio Beacon" callout adaptive #650

[davecraig]

When playing back a route the iOS announcements are as follows (need to double check all of these):

• Intro sound
• ...delay whilst intro plays...
• "Beacon set on marker name distance away x of n"
• "Marker name annotation" (for not in route but nearby)
• Countdown is just distance e.g. "320ft"
• When the waypoint is very close a background humming sound starts and then changes pitch when really close
• "Arrived at marker name"
• "Moving beacon to next marker name"
• On completion and on muting of the beacon the outro sound
• On completion "Route complete" is announced

If route is stopped then the outro sound always plays.
If a route isn't playing, just an audio beacon, then the distance countdown says: "Beacon distance away"